Chuck-operating mechanism



Dec. 16, 11924. l,519,337

O. SCHLAUPTZ CHUCK OPERATING MECHANI SM Filed Jan. 29, 1923 2 sheets-Shea 1 N i: QJ

/f A TTORNE YS,

CHUCK OPERATING MECHANISM Filed Jan. 29, 1923 2 Sheets-Sheet 2 v i 8 /NLENTO/e A f ,7 W7 5 /ff A TTORNEYS* Patented Dec. .116, 1924.

UNITED '1 -STATES.l

1,519,331 PATENT OFFICE.:

v oswarn scnLAUrITz, or, CANTON, omo, nssreNon. 'ro THE TIMKEN 'ROLLER BEAR- ING couur'nNY, or` CANTON, omo,

A CORPORATION OF OHIO.

CHUCKeOPEBATING MECHANISM.

To all whom t may concern.' 4

Be it known that I, OswALD SoHLAUrrrz,

a' citizen 'of the United States, and a resident of the city of Canton, in the county of Stark and State of Ohio, have invented a new and useful Improvement in Chuck-Operating Mechanism, of which the following is a specification. i

My. invention relates to Vchuck operating mechanism, particularly to devices intended for holding roller `bearing cones or other annulaiarticles tobe ground. The principal objects of the'invention are to devise an operating mechanism for chucks that can open and` close the chuck while it is being rotated and that will lock the chuck in both positions. L

The invention consists principally in the parts and combinations of parts hereinafter described and claimed.

In the accompanying drawing, Fig. 1 -is a longitudinal horizontal sectional view of a chuck and operating vmechanism therefor embodying 'my invention,

Fig. 2 `isan end view of a chuck with the guard plate therefor removed and taken on the line 2-2 'in Fig. 1.

Fig. 3 is .a cross-sectional view 3-3 in Fig. 1, 30 Fig. 4 is a cross-sectional view on-the line 4-4 in Fig. 1 and,I

Fig. 5 is a fragmentary elevation of the cam mechanism for the operating sleeve of the operating mechanism.

Rotatably mounted in a suitable frame 1 of a grinding machine or the like is a hollow spindle 2 which mayy conveniently, be provided witlr a pulley-wheel?, for rotating it. Suitable bushings 4 are provided for the spindle.

Mounted in longitudinally operating the chuck. Preferably said ro 5 has a. tubular extension 6 projecting from the end thereof on which is mounted an annular supporting member 7. Preferably the extension'6 of 'the operating rod 5 is provided with a reduced portion ing a shoulder 9l against which the annular supporting member 7 abuts and is held by a nut 10 mounted on the end of the extension of the operating rod. Pivotally secured in slots in the annular supporting member 7 as by pins 11 are work engaging fingers 12. Secured at the end of said spindle 2 as by on the line the spindle 2 and movable thereof is a draw-rod 5 for means of an interiorly beyond the outer end in the is an annular plate d roller bearing cone 24 is heldv 8, thus-provid-- threaded portion 13 cooperating with threads at the end of said spindle 2 is a hollow shell y14 that projects beyond the end of the spindle. Secured to the base ofsaid shell 14 as by screws 15 are a plurality of" arms 16 that are preferably made of spring metal. Said arms 16 extend of the shell 14 and are projections 17 that. extend radially inward of the shell. Preferably said projections have adjustable contact members 18, as screws, mounted therein,

provided with Each of the work engaging fingers 12 is i provided at its outer end with a projection or cam portion 19 that is adapted to be engagedv by the contact screw 18 of aspring arm 16, so that the said linger maybe moved inward ofthe chuck. At itsother end, each work engaging finger is provided with a projecting portion 20 that ridesv iny a slot 21 hollow shell. By this arrangement, the fingers 12 and hence the nnprating rod 5 rotate with the spindle 2. When the operating rod 5 is moved in one direction, the projection 20 of each finger 12 strikes the wall of the shell at the end of a slot 21, thus swinging the outer ends of the fingers out-v ward of 'the chuckyanad releasing an article v held in the chuck.

Secured to the end of the hollow shell 14 22 and secured to said annular plate is an abutment as a roller bearing cone having a rib 25 at each end. The abutment plate preferably has a plurality of raised portions 23"v that are accurately finished to form the work seat, Secured to the annular plate 23 as by screws 26, and spaced away therefrom as by plugs-27 in an annular guard 28.-

The operation of the chuck is as follows:

In the construction shown in Fig. 1, the in position in the chuck by the work engaging fingers 12. The fingers 12 press against thebearing surface of the cone 24 but principally their pressure is against the rib 25 yat the larger. end of the cone. When the'cone has been ground out, the operating rod. is moved to the right,l and when the projections 20 at the e-nd of the fingers 12'reach the end of the slots 21 in the hollow shell 14, the outer ends 'of the fingers are swung clear of the work, which may then be removed, while the chuck is still rotating, and anew cone inplate 23 for the work 24, which in the drawing is shown j variation sert'ed. The operating rod 5 is then moved to the left, and the projections 19 at the outer ends of the fingers 12 strike against the adJusting screws 18 of the spring arms 16 and are rced against the cone; Any slight of the cone from the Standard size is compensated for by the yieldability of the spring arms 16. The slots 2l in the shell and other slots 29 that may be provided permit the escape from the chuck of dirt and the Jwater or other liquid with which the work is ordinarily sprayed during the grinding operation.

` for operating threaded portion 51 It 1s customary to test the bore of the cone by inserting a plugl gage is sometimes Accordin mounted 1n the o'erating rod 5 so as lto be iilicult to remove.

movable lonlgitudmally thereof, and 1 tute a knee out for a plug gage. knockout rod 30 is provided vwith a suitable .operating handle 31, 'with which it has va pivotal connection as by means of a bolt 32. .The operating handle 31 is secured to a suitable member 33 of the frame 1 of the grinding machine.

Any'suitable mechanism may be provided the chuck. .'Apreferred form is shown in the drawings.

Secured vto the spindle`2 as by means of'a threaded portion -50 cooperatin with a of the bore o the spindle is an annulus 52 whose periphery isrovided with a pluralityof radially exten ing recesses 53. In each recess is disposed a .ball 54 and between'the-ball and the end of receive ,a -bal -A.., which the balls, 54

the recess 53 is a coil spring 55 Athat tends and mounted on the operating rod 5 is a rod soA as to4 be liked collar `61 that is provided with -a circumferential flange 62r The rod 5 has a shoulder 63 against which the collar ordinarily abuts. The outer `face of said collar 61 is provided with a tion of each coil spring being dispose in a recess 66 provided therefor in a second collar'67 that is threaded on to the operating thereto. The lsprings 65. tend to hold` saidl collar 61V against the shoulder- 63 on the rod r5. A suitable bushplug age therein. Thisto my invention a rod 30 is' 54 into their pockets.

flange 58 at the end 77 flange so as to over- `the Secured tothe 1. series .of balls 73, thus fing member 70 with it.

plurality of recesses 64 in 'each 'of whlch is disposed acoil spring 65 -that projects therefrom, the projecti poring 68 is threaded into the end of the bore of (the fixed collar67. -The annulus 52 and the collars 61 and 67 are heldin alinement4 -cured to the bearing member as bybeing screwed thereon. Two series of balls 73 are mounted inthe bearing member, one series adjacent to each flange. A sleeve 74 has its bore provided with a circumferential rib or flange-75 that is disposed in thespace between the-two series of balls 73. The 'sleeve is provided with oppositely disposed bolts 76 or studs projecting inwardly thereof, to each of which'is secured a roller 77 that rides in a cam slot y7 8 that is provided therefor in a cam sleeve 79 that is secured `to the frame member. Secured tothe operating sleeve 74 is asuitablehandle 8O for operating it.

In the position shown in Fig..1, the chuck closed, as above stated. The mechanism is locked by reason of the fact that the balls 54 extend into the holes '57 in the locking sleeve 56. In orderto release or open the chuck, theoperating sleeve 74 is moved .to

the right by means of the handle 80. The

amount of movement of the operating sleeve is determined by the cam slots 78. The sleeve by pressing against the right hand series of balls 73, carries with it the bearing member which forcesvthe locking balls When the bearing member 70 strikes lthe ring 59l in the lockv sleeve 56 said lock. sleeve, the collars 61 and 67 and the operating rod' are moved, the lock sleeve 56 pressing` the-balls 54 inward in their recesses., In open position,

the parts are locked by means of the rollers being disposed. in the offset portions of cam slots 78 after the manner. of a bayonet joint. `To `close the chuck, Athe handle is moved to cause the operating sleeve 74 to move to the left (rear) and the rib 75 thereof presses against the left (rear) carrying the bearmember 70 strikes the ilange 62 of the collar 61, the collars 6l and 67 and ,thedraw thus closing rod 5 are caused to move also, n

herelnbefore the work engaging finders as described. D b

The roller bearing cones that are ground have ribs that vary somewhat in widthjand .the purpose of thesprings 65 that are held in the collars 61 and 67 is to compensate lWhen' the bearing for such variation. 'I he collar 61- is capable i of limited longitudinal movement `on .the operating rod.- A conewhose rib is wider than the standard Will-force the' colla'rvoi its seat 'against the pressure of the springs.

. moves with the chuck is adapted to accurately center and collar as it moves in one other direction,'thereby .and said draw rod, and means 'permitting hold annular articles .of varying length and, thickness. The articles may be inserted and" removed while the chuck is rotating. convenient knockout isprovided for loosen; ing the plug gage with which the cone is tested. The-operating mechanism is likewise operable 'while' the device is rotating and the ball bearings minimize the frictionl between the operating sleeve and the rotatinfr parts. y,

,b-viously, numerous changes might be made without departing from the invention, and I do not wish to be limited to the precise-` construction shown.

What I claim is:

1; A frame, a hollow spindle rotatably mounted therein, a chuck operating draw rod in the bore ofy said spindle, rotatable therewith and movable axially thereof, a flanged collar yoperatively connected with said rod to move it axially, a sleeve secured to said collar and having a. circumferential flange at the end, a ring secured to said flange, a member slidable on said sleeve, said member engaging said flange on said direction and said ring on said sleeve flange as it moves inthe moving said collar limited relative longitudinal movement of said collar and said chuck operating rod.

2. A frame, a hollow spindle rotatably mounted therein, a chuck operating draw rod in the bore of said spindle, rotatable therewith and movable axially thereof, a flanged collar operatively connected with said rod to move it axially, a sleeve secured to said collar and having a circumferential flange at vthe end, a ring secured to said` flange, a.. member slidable on said sleeve, said member engaging said flange on said collar as it moves in one'directionand said ring on said sleeve flange as it moves in the other direction, thereby. moving said collar'and said draiv rod, and means permittinfr limited relative longitudinal move= ment df said collar and 'said chuck operating rod, said means comprising a shoulder on said draw rod against which said collar abuts, a second collar fixed on said rod and springs interposed between said collars.

3. A frame, a hollow spindle rotatably mounted therein, a chuck operating ydraw rod in the bore of said spindle rotatable therewith and movable axially thereof, an annular member secured to the end of said spindle and provided with a circular series =v of radially disposed recesses, a ball in each of said recesses, a spring interposed between each ball and the end of its recess, a flanged collar mounted on said rod, a sleevesecured to said collar and overlapping said annular member, said sleeve having acircumferential flange at the end and having a series of holes adapted to receive said balls to lock said sleeve and annular member together, a ring secured to said flange and overhanging said holes, a member slidable on said sleeve, said member disconnecting said sleeve and annular member and gaging said flange on said collar as it moves in one direct-ion and said ring on said sleeve flange as it moves in the other direction.

4.' A frame, a mounted therein, a chuck operating rod in the bore of said spindle, rotatable therewith and movable axially thereof, an annular member secured to the end of saidy spindle and provided with a circular series of radially disposed recesses,l a ball in each hollow spindle rotatably Iof said recesses, a spring interposed between each ball and the end of its recess, a flanged collar mounted on said rod, a sleeve secured to said collar and overlapping 'said annular member, said ksleeve having a circumferential flange at the end and having a series of holes adapted to receive said balls tolock said sleeve and annular member together, a ring secured to said flange and overhanging said holes, a member slidable on said sleeve, said member disconnecting said sleeve and annular member and engaging said flange on said collar as it moves in one direction and said ring, on said sleeve flange as it moves in the other direction, said slidlable member having circumferential flanges .with and movable axially thereof, an annularmember secured to said spindle, said annular member having a circular series ofl radially disposed recesses therein, a ball mounted in each of said recesses, a spring between each ball and the bottom of its a chuck operatin rod recess, a collar operatively connected with said chuck-operating rod, a. sleeve secured tosaid collar and fitting over said annular member, said sleeve having a circular series of openings adapted to receive said balls to lock said sleeve and said annular member together, and means disconnecting said sleeve and annular member and for moving said sleeve and chuck' operating rod longitidinally 4without preventing rotationthere- 6. In a devicei of the kind described, a hollow rotary spindle, a chuck operating rod in the bore of said spindle rotatable t erewith and movable axially thereof, an annular member secured to said spindle, said of openings adapted to receive said balls to lock said sleeve and said annular 'member together, means dlsconnectlng' sald sleeve and annular member and for moving said sleeve andchuck operating rod longitudinallywithout preventing rotation thereof, and means permitting limited relative longitudinal movement of said collar and said chuck operating rod.

7. In a device -of the kind described, a hollow rotary spindle, a chuck operating rod in the bore of said spindle rotatable therewith and movable axially thereof,vv any annular member secured to said spindle, s aid annular member having a circular series of radially disposed recesses therein, a ball mounted in each of said recesses, a spring between eachball and the bottom ofits recess,a collar operatively connected with said chuck-operating ',g'rod, an

sleeve secured to said collar and fitting over said annular member, said sleeve havin -a `circular series of openings adapted to receive said balls to lock said sleeve and annular member together, means disconnecting said sleeve and annular member and for moving saidsleeve and chuck operating rod longitudinally without preventing rotation thereof, andmeans permittin limited relative longitudinal movement Vo said collar and said chuck operating rod', said'means comprising a shoulder'pn said rod against which the collai-'abuts, a second collar fixed on the rod andy springs interposed between said col lars said springs tending to seat said first collar against said shoulder on said rod.

Signed at Canton, Ohio, this 23d day of January, 1923. l

' o'swALD SCHILAUPITZ. 

